An anti-instrument drop device for cable testing in oil and gas wells
A technology for cable testing and testing instruments, which is used in wellbore/well components, construction, earth-moving drilling, etc. Effect
Active Publication Date: 2021-08-03
PETROCHINA CO LTD
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- Description
- Claims
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Problems solved by technology
Pulling the cable hard will increase the force on the cable so much that the cable will be broken, which will cause the instrument to fall to the bottom of the well, not only the detection data cannot be recorded, but also affect the normal oil and gas production and the instrument will fall to the bottom of the well and be damaged and scrapped. cause serious economic losses
Method used
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[0029] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0030] figure 1 It is a schematic structural diagram of an instrument drop prevention device for cable testing in oil and gas wells shown in an exemplary embodiment of the present invention. see figure 1 , the present invention provides a kind of anti-instrument drop device for cable testing in oil and gas wells, comprising at least:
[0031] The upper connector 3 for connecting with the cable connector;
[0032] The claw support sleeve 4 located under the upper joint 3;
[0033] The spring 5 arranged in the claw support 4 and abutting against the inner upper surface 401 of the claw support 4;
[0034] A tension adjustment head 6 abutted against the lower end of the spring 5 and connected to the upper joint 3; and
[0035] A steady frame 10 connec...
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The invention discloses a device for preventing falling of an instrument for cable testing in oil and gas wells. The device includes: an upper joint for connecting with a cable joint; a jaw support located below the upper joint; a spring abutting against the inner upper surface of the jaw support; abutting against the lower end of the spring and connected with the upper joint The tension adjustment head; and the center frame connected with the lower end of the jaw support sleeve and used to connect with the downhole testing instrument; wherein, the center frame includes the first part of the center frame located inside the jaw support sleeve and the outside of the jaw support sleeve The second part of the center frame; the claw support sleeve has an axial open slot, and at least one claw that can rotate relative to the claw support sleeve is arranged in the open slot; between the first part of the center frame and the claw, set There is an elastic part for expanding the lower end of the claw; and the upper end of the claw is stuck between the tension adjustment head and the claw support sleeve. The device can be stuck on the oil pipe coupling, effectively preventing the connected instrument from falling down to the bottom of the well, being damaged and scrapped.
Description
technical field [0001] The invention relates to the technical field of instrument testing in oil and gas wells, in particular to an instrument drop prevention device for cable testing in oil and gas wells. Background technique [0002] In the process of oil and gas production, it is often necessary to lower various testing instruments into oil and gas wells for testing. Occasionally, during testing, the downhole tool became stuck in the wellbore casing. Pulling the cable hard will increase the force on the cable so much that the cable will be broken, which will cause the instrument to fall to the bottom of the well, not only the detection data cannot be recorded, but also affect the normal oil and gas production and the instrument will fall to the bottom of the well and be damaged and scrapped. cause serious economic losses. Contents of the invention [0003] The invention provides a cable testing instrument drop prevention device in an oil and gas well, which is used to...
Claims
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IPC IPC(8): E21B47/017E21B41/00
CPCE21B41/0021E21B47/017
Inventor 张智峰史国宏马鸿礼杨国军宋彦海杨喜彦吴胜利冯胜利
Owner PETROCHINA CO LTD